[Withstand mild to moderate chewing; Made of natural nylon and edible cowhide free of BPA and phthalates safe non-toxic. "Ideal pet toys for fetch and retrieve games; greatly excite your pet and extend the playing time release the dogs pressure cultivate your dogs trust and understanding and reduce destructive behavior." "Beef flavor dog toy satisfies your dogs natural chewing instincts." Tested by German Shepherds Mastiffs Siberian huskies Labrador Golden retrievers and Pitbulls. If you have any questions please reach out to us we will get back to you very soon once message received.]